Logic Deduction

Play Logic Deduction free online. Syllogisms, orderings and truth-teller puzzles: what must be true?

Test your reasoning with deduction puzzles. Decide what must follow from a set of statements — and learn when the honest answer is “cannot be determined”.

  • Category: Brain Games
  • Difficulty: hard
  • Players: 1 player
  • Typical game: about 5 minutes
  • Works on: desktop, phones and tablets

How to play Logic Deduction

Objective: Solve ten deduction puzzles.

  1. Choose a difficulty and press Start.
  2. Read the statements carefully and choose what must be true.
  3. Take your time: questions are not timed.
  4. Each round has 10 questions. You see the right answer after every question.

Scoring

100 points per correct answer, up to 50 more for answering quickly, and +20 per answer while on a streak of 3 or more. Getting 60% or more counts as a win.

Difficulty levels

Easy: simple orderings and syllogisms. Normal: conditionals and day puzzles. Hard: knights and knaves, trick questions and invalid conclusions.

Tips

  • “Must be true” means true in every possible case.
  • Watch for reversed conditionals: wet grass does not prove it rained.

Controls

Keyboard

  • 1–4 to pick an answer
  • Enter for the next question
  • P to pause, R to restart

Mouse

  • Click an answer

Touch

  • Tap an answer

Logic Deduction achievements

  • First Answer – Get your first answer right.
  • High Scorer – Score 1,200 points in one round.
  • Perfect Round – Answer every question in a round correctly.
  • On a Roll – Get 7 answers right in a row.

Frequently asked questions

Is Logic Deduction free to play?

Yes. Logic Deduction is completely free on GamesPlayLand, with no download, no sign-up and no purchases.

How do you play Logic Deduction?

Solve ten deduction puzzles. Choose a difficulty and press Start. Read the statements carefully and choose what must be true.

Can I play Logic Deduction on my phone?

Yes. Logic Deduction works in mobile browsers on phones and tablets. Tap an answer.

Does Logic Deduction save my high score?

Yes. Your personal best, statistics and achievements for Logic Deduction are saved in your browser automatically.

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